Mold for chimney-caps.



No. 679,329. Patented July' 30, I90l. l. W.. OSTRANDER 84. R. BOOK.

MOLD FOR CHIMNEY CAPS.

(Application filed Nov. 28, 1900.) (N 0' Modal.)

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IRA W. OSTRANDER AND RAY COOK, OF YORKSHIRE, NEWV YORK.

SPECIFICATION forming part of Letters Patent No. 679,329, dated July 30, 1901.

Application filed November 28, 1900- Serial No. 38,064. (No model.)

T at whom it may concern.-

Be it known that we, IRA W. OSTRANDER and RAY 000K, citizens of the United States, residing at Yorkshire, in the county of Cattaraugus and State of New York, have invented certain new and useful Improvements in Molds for Chimney-Caps; and we do'hereby declare the following to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to molds in general, and more particularly to that class designed for molding plastic materials, and it has specific reference to molds for forming cement chimney-tops, the object of the invention being to provide a cheap and simple construction of mold in the assembling of the parts of which there will be entailed a minimum of labor and which may be readily taken apart to permit of withdrawal of the casting, further objects and advantages of the invention being evident from the following description.

In the drawings forming a portion of this specification and in which like numerals of reference indicate similar parts in the several views, Figure 1 is a perspective view of the mold with the base-board removed and ready to be filled with the plastic material from which the chimney-cap is to be made. Fig. 2 is a section on line 2 2 of Fig. 1. Fig. 3 is a perspective view of the core of the mold with the parts thereof disassembled, one end board of the core being in place. Fig. 4: is a section on line 4 4 of Fig. 1. Fig. 5 is a perspective view of the cap formed with the mold, and Fig. 6 is a detail View of a portion of the mold.

Referring now to the drawings, the shell of the mold consists of a plurality of ribs 5, which are disposed parallel, and each of which ribs consists of two pieces disposed in alinement, said ribs having curvilinear recesses cut in their upper faces at the inner ends of the sections thereof, and upon the curved edges of the two sets of rib-sections are secured two sheets 6 and 7, of suitable sheet metal. The sections of the ribs at the outer ends of the curved recesses are connected by parallel strips 8 and 9, which are covered by the metal sheets. Through the end ribs are passed bolts 12, which latter are engaged with perforations in end boards 13 and 14, which are disposed against the ends of the curved sheets 6 and 7 and are held in place by means of thumbnuts 15 engaged with the bolts. These plates 6 and 7 act to shape the outer surface of the casting.

A core is provided for the mold and consists of a body portion 16, the transverse section of which is in the form of a curvilinear triangle having a fiat base, and at one end of this body portion of the core is formed a radiating flange 17, which has a curvature similar to the curvature of the side faces of the body of the core and of such dimensions that when the core is in place in the mold the outer faces of this flange will fit closely against the plates 6 and 7. At the flat side of the body of the core the flange 17 is of lesser width than at the apex of the curvilinear sides. At the opposite end of the body of the core from the flange just described are formed lugs 18, and these lugs are adapted for engagement in the corresponding recesses 19 of a short body-section 20, which forms a continuation of the main body of the core and is provided with a flange 21, which is a duplicate of the flange 17. The outer facesthat is, the faces that aline with the ends of the coreare at right angles to the body of the core, while the mutually-adjacent faces of the flanges converge in the direction of the ridge of line of meeting of the curvilinear faces of the body of the core. When these two core-sections are in position, they are of a size to fit snugly within the shell of the mold and against the plates 6 and 7. The core is of course inverted in the shell of the mold, so that its flat side lies uppermost, and in the plane of this flat side of the core the plates 6 and 7 are bent outwardly to the strips 8 and 9. This portion of the mold forms the curvilinear side Walls 22 and 23 of the finished cap, (shown in Fig. 5 of the drawings,) while the base of the cap is formed by that portion of the shell of the mold above the sheets or plates 6 and 7.

To form the opening 25 leading through the base of the cap, an extension 26 of the core is provided, this extension being in the form of a block having a contracted stem 27 which is engaged with the recess 28 in the flat side of the body of the core, this block being of less length and width than the base of the core to form the inwardly-projecting shelf 29, which extends into the inclosure of the side walls 20.

Depending from the side edges of the base of the chimney-top is a flange to fit over the top of the chimney,to which the cap is fitted, and to form this flange a base-board 30 is provided, this base-board having a recess 31 therein to fit over the block 26, above referred to, this base-board being adapted to lie within the inclosure of the shell of the mold and flush with the upper edge of the latter, but separated therefrom by a slight interspace. The sections of the ribs which support the sheets or plates 6 and 7 are con nected with hinges 35.

In practice the parts of the mold are assembled, with the exception of the base-board, and the plastic material for the casting is put into the mold until it almost fills the shell of the mold. The base-board is then put in place and the space between the edge of the baseboard and the sides of the shell is filled. The material is then permitted to harden. When the material is hard, the thumb-nuts are removed and the end boards are taken down, the base-board having been first removed, and the block 27 is taken out. The sections of the shell, including the ribs, are then moved upon their hinges to separate the sheets or plates 6 and 7, and the casting is removed from the shell, after which the short body portion of the core is disengaged from the long body portion, and this long body portion is finally drawn from the inclosure of the cap, when the cap is completed.

It will be understood that in practice various modifications of the specific construction shown may be made and that any suitable materials and proportions may be used for the various parts without departing from the spirit of the invention.

What is claimed is 1. A mold comprising spaced and parallel ribs each comprising sections having the upper faces thereof cut away at their inner ends,

metal plates disposed in the cut-away por-- tions, end boards removably connected with the outermost ribs, a core comprising a separable body portion having end flanges formed to fit against the plates and hold the body portion spaced therefrom, a base-block removably engaged with the body of the core and spaced from the side edges of the latter, and a base-board removably engaged with the base-block, said base-board lying within the inclosure of the mold and separated therefrom at its edges.

2. A mold comprising a shell divided longitudinally to form two sections, said sections having hinge connections, a core comprising a body portion having end flanges adapted to fit within the shell and hold the body spaced therefrom, said core being separable and the adjacent faces of the flanges being converged, a base-block removably engaged with the body of the core and adapted to lie with its upper face adjacent to the upper edge of the shell, and a base-board having a recess to receive a portion of the base-block, said board being adapted to lie Within the shell, spaced therefrom and from the adjacent face of the core.

3. A mold comprising parallel ribs having sections, the inner ends of the sections being cut away at their upper edges, cross-pieces connecting the ribs at the upper portions of the cut-away portions, metal sheets secured to the ribs in the cut-away portions, the sections of the ribs having hinged connection, a core having flanges at its end portions formed to fit against the plates and hold the body of the core spaced therefrom, the upper face of the core being flat, a base-block engaged with the upper face of the core and having less transverse dimensions than the core, a baseboard engaged with the base-block and separated from the core and the edges of the mold by interspaces, said core being separable, and end boards removably secured to the outermost ribs and against the ends of the sheets.

In testimony whereof We hereunto sign our names, in the presence of two subscribing witnesses, on the 17th day of October, 1900.

IRA W. OSTRANDER. RAY COOK.

Witnesses:

E. M. LEWIS, M. W. WHITING. 

